Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '434645a1c46349e85dc151b8e916e5f86fbaec098dcf62dbff15af08bccebcaf' 
  AND token = 'qMC06aRZAF1fRkRfgLf73D0x8bV74shHtA0dM+P+OVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}